Chemistry
Coach Tutorials - "Links to a number of site with tutorials,
directions, or instruction about chemistry topics including balancing
chemical equations, types of reactions, formulas, the mole, stoichiometry,
and class information."

Chemistry
Functions - "Offers a tool to conduct molar conversions. A periodic
table is also featured for reference, with atomic numbers, molar mass,
and element symbol for each element."

Dan Damelin's
Chemsite - "Part of a project to teach high school chemistry
using a website as an integrated in class tool. Includes Flash animations,
PDF files of labs and homework assignments, still images, and short video
clips which help students to organize and visualize chemical concepts."